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United States Patent | 6,067,433 |
Kimura ,   et al. | May 23, 2000 |
A developing apparatus includes a developer bearing member, a first magnetic pole and a second magnetic pole of a same polarity as that of the first magnetic pole, and a regulating member. A regulating portion of the regulating member is provided within a range from a point of the maximum magnetic flux density of the second magnetic pole and an angular point corresponding to a half of the half value width of the second magnetic pole at the downstream side in the rotating direction of the developer bearing member.
Inventors: | Kimura; Shigeo (Mishima, JP); Masuda; Koji (Numazu, JP); Ogata; Takao (Susono, JP); Hasegawa; Kazuhiro (Numazu, JP) |
Assignee: | Canon Kabushiki Kaisha (Tokyo, JP) |
Appl. No.: | 110019 |
Filed: | July 2, 1998 |
Jul 04, 1997[JP] | 9-194845 | |
Oct 31, 1997[JP] | 9-316478 |
Current U.S. Class: | 399/274; 399/264; 399/275; 399/277 |
Intern'l Class: | G03G 015/09 |
Field of Search: | 399/274,275,277,269,252,264,265,267 |
4873551 | Oct., 1989 | Tajima et al. | 399/270. |
4982689 | Jan., 1991 | Honda et al. | 399/270. |
5253018 | Oct., 1993 | Takeuchi et al. | 355/246. |
5434351 | Jul., 1995 | Iwai et al. | 399/276. |
5469244 | Nov., 1995 | Ogata et al. | 355/246. |
5559587 | Sep., 1996 | Ogata et al. | 355/246. |
5606404 | Feb., 1997 | Hilbert et al. | 399/267. |
5697010 | Dec., 1997 | Masuda et al. | 399/46. |